gistfile1.rb

  def x_put (blob)
    self.permalink = UUID.random_create.to_s if self.permalink.blank?
    imgs = Magick::Image.from_blob(blob)
    first = imgs.first
    case first.get_exif_by_entry("Orientation") && first["EXIF:Orientation"]
      when "6"
        first.rotate!(90)
        first["EXIF:Orientation"] = "1"
      when "3"
        first.rotate!(180)
        first["EXIF:Orientation"] = "1"
      when "8"
        first.rotate!(270)
        first["EXIF:Orientation"] = "1"
    end
    sizes = {
      :main => {:cols => 640, :rows => 480},
      :thumb => {:cols => 400},
      :icon => {:cols => 128}
    }.each { |x_key, size|
      geometry = if size[:rows] then
        "#{size[:cols]}x#{size[:rows]}>"
      else
        "#{size[:cols]}x"
      end
      first.change_geometry(geometry) { |cols, rows, img|
        resized_blob = img.resize(cols, rows).to_blob
        local = File.new("/tmp/#{self.permalink}_#{x_key}", "w+")
        local.write(resized_blob)
        local.close
        Aws.put_key(x_key, self.permalink, resized_blob)
      }
    }
  end